DT&T Macintosh Services, Inc. is now offering a US$600 upgrade for PowerBook 3400 machines. In exchange for your old logic board, they will install the logic board from an original PowerBook G3 (sometimes called the 3500). Check out Apple’s specs for the machine – this is a good deal for people who don’t want to spend the money for a new machine. DT&T is located in Fremont, CA. Telephone: (800) 622-7977.